Mischievous means playfully troublesome or causing minor problems for fun rather than harm. A mischievous child might hide their sister's shoes right before school, not to be mean, but because they enjoy the harmless prank. A mischievous cat might bat objects off a table just to watch them fall.

The key to understanding mischievous behavior is that it comes from a spirit of playfulness, not meanness. When you see a mischievous grin on someone's face, you know they're plotting something slightly naughty but not actually harmful. Classic mischievous characters in stories, like Tom Sawyer or Curious George, get into trouble constantly, but their hearts are in the right place.

There's an important difference between being mischievous and being cruel or destructive. Putting a whoopee cushion on someone's chair is mischievous. Breaking something valuable or hurting someone's feelings isn't mischievous at all, it's just mean. Mischievous behavior involves creativity and humor, causing laughter or mild annoyance rather than real damage. Most adults look back fondly on their mischievous childhood adventures, the harmless schemes and pranks that made growing up memorable.